APA (7e ed.) Bronvermelding

Assagioli, R. (1973). The act of will (ed.). Penguin group.

Chicago (17e ed.) Bronvermelding

Assagioli, Roberto. The Act of Will. ed. New York: Penguin group, 1973.

MLA (9e ed.) Bronvermelding

Assagioli, Roberto. The Act of Will. ed. Penguin group, 1973.